Migrate frontend sources to TypeScript

scripts/format-check.mjs

@@ -6,11 +6,14 @@ const scriptDirectory = path.dirname(fileURLToPath(import.meta.url));
 const repoRoot = path.resolve(scriptDirectory, "..");
 
 const directoriesToScan = [
+    path.join(repoRoot, "RpgRoller", "frontend"),
     path.join(repoRoot, "RpgRoller", "wwwroot"),
     path.join(repoRoot, "openapi")
 ];
 
 const filesToScan = [
+    path.join(repoRoot, "package.json"),
+    path.join(repoRoot, "tsconfig.frontend.json"),
     path.join(repoRoot, "scripts", "generate-api-client.mjs"),
     path.join(repoRoot, "scripts", "lint-frontend.mjs"),
     path.join(repoRoot, "scripts", "format-check.mjs")